Effects of vermicompost applications on Atterberg Limits and workability of soils under different soil moisture contents

Authors : Zeynep DEMİR

Pages : 215-221

Doi:10.18393/ejss.888643

View : 18 | Download : 5

Publication Date : 2021-07-01

Article Type : Research Paper

Abstract :The present research was conducted to assess the effects of vermicompost insert ignore into journalissuearticles values(VC); treatments under different soil moisture contents on consistency limits of sandy-clay-loam insert ignore into journalissuearticles values(SCL); soils in which lettuce insert ignore into journalissuearticles values(Lactuca sativa var. crispa); was cultivated in a greenhouse. Liquid limit insert ignore into journalissuearticles values(LL);, plastic limit insert ignore into journalissuearticles values(PL);, plasticity index insert ignore into journalissuearticles values(PI);, consistency index insert ignore into journalissuearticles values(Ic); and clay activity insert ignore into journalissuearticles values(A); values were investigated. Three different VC doses insert ignore into journalissuearticles values(0, 2.5 and 5% w/w); were applied at 3 different soil moisture contents insert ignore into journalissuearticles values(100% FC-field capacity, 50% FC and 25% FC);. Experiments were conducted in 3 replications over 27 experimental plots insert ignore into journalissuearticles values(3×3x3);. Increasing LL and PL values were observed with increasing VC doses. The greatest LL insert ignore into journalissuearticles values(46.6%); and PL insert ignore into journalissuearticles values(37.7%); values were obtained from the 5% VC treatment under high soil moisture content insert ignore into journalissuearticles values(100%FC); and the lowest LL insert ignore into journalissuearticles values(35.0%); and PL insert ignore into journalissuearticles values(23.0%); were obtained from the control treatment under low soil moisture content insert ignore into journalissuearticles values(25%FC);. LL had significant correlations with VC insert ignore into journalissuearticles values(0.848**);, PL insert ignore into journalissuearticles values(0.904**);, PI insert ignore into journalissuearticles values(0.565**);, Ic insert ignore into journalissuearticles values(0.668**); and A insert ignore into journalissuearticles values(0.548**);. Ic had significant correlations with VC insert ignore into journalissuearticles values(0.815**);, PL insert ignore into journalissuearticles values(0.417*); and PI insert ignore into journalissuearticles values(0.740**);. As compared to the control treatments, Ic values increased by 13.0% and 21.9% respectively with 2.5% and 5% VC treatments. Ic values were greater than 0.75. Therefore, it was observed that the sandy-clay-loam soils could be cultivated without any structural deformations at FC or higher moisture contents with vermicompost application. Moisture content upper limits for optimal tillage without any structural destructions were suggested as 26.8%, 34.9% and 36.9% for 0%VC, 2.5%VC and 5%VC treatments, respectively. Present findings indicated that VC treatments extended the range of moisture for workability.
Keywords : Atterberg Limits, vermicompost, soil water regimes, soil cultivation, sandy clay loam soil